Exceptional or unusual; not following precedent or typical practice.
異例の大雨でイベントは中止になった。
The event was canceled due to unusually heavy rain.
今回は異例の措置として全員が在宅勤務になった。
This time, as an exceptional measure, everyone worked from home.
社長が突然辞任したのは異例の出来事だ。
The president's sudden resignation is an unusual event.